Which Beauty Gizmos Really Work?

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High-tech beauty solutions

Lisa Shin

If you're looking to add a few high-tech gadgets to your beauty artillery, look no further. From cellulite busters and zit blasters, to face lifters and hair zappers, we rounded up seven beauty devices that will give a big boost to your at-home spa.

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The callus blaster

How it works High-speed oscillation plus a buffing brush, smoothing disk and treatment creams help soften feet.

Our tester's take After using it just twice, our staffer noted significantly softer, callus-free feet. In her words: "Magic!"

Expert analysis "The device is safer than other scrapers, which can lead to infection," says Doris Day, MD, clinical associate professor of dermatology at New York University School of Medicine. (Avoid if you have diabetes.

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The diy whitener

How it works This mouthpiece uses heat and light to activate a whitening gel.

Our tester's take "It's easy to useI kept it in while watching TV," she said. And it worked: Her stains faded in five days.

Expert analysis "What I like most is the desensitizing agent in the peroxide gel," which makes whitening more tolerable, says Jack Ringer, DDS, president of the American Academy of Cosmetic Dentistry. Alas, you'll need to see a pro for truly dramatic results.

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The mani maximizer

Lisa Shin

Red Carpet Manicure Starter Kit, $65; ulta.com

How it works The polishes harden when exposed to the LED wavelength for a salon-style gel finish.

Our tester's take Despite having a manicure that held up for two weeks, our tester was turned off by the process. "Your nails have to dry fully between each step or you'll have subpar results," she said.

Expert analysis It is legit, reports celebrity manicurist Jin Soon Choi, who notes the mani will last as long as the salon kind.